EP 3498997 B1 20200715 - ABNORMALITY DIAGNOSIS DEVICE FOR REDUCING AGENT ADDING DEVICE
Title (en)
ABNORMALITY DIAGNOSIS DEVICE FOR REDUCING AGENT ADDING DEVICE
Title (de)
ANOMALIEDIAGNOSEVORRICHTUNG FÜR REDUKTIONSMITTELZUGABEVORRICHTUNG
Title (fr)
DISPOSITIF DE DIAGNOSTIC D'ANOMALIE POUR DISPOSITIF D'AJOUT D'AGENT RÉDUCTEUR
Publication
Application
Priority
JP 2017239728 A 20171214
Abstract (en)
[origin: EP3498997A1] In an abnormality diagnosis device for a reducing agent adding device, a decrease in diagnostic accuracy under the influence of a pump discharge capacity is suppressed. In the abnormality diagnosis device which carries out an abnormality diagnosis of the reducing agent adding device by obtaining a diagnostic parameter which is a parameter correlated with an amount of pressure drop in a reducing agent passage (6) in the case where, from a state in which an addition valve (3) has been closed and in which a voltage to be applied to a pump (5) is controlled to a diagnostic voltage so that the pressure in the reducing agent passage (6) becomes a predetermined pressure, the addition valve (3) is made to open in a state where the voltage to be applied to the pump (5) is maintained at the diagnostic voltage, and by making a comparison between the diagnostic parameter and a predetermined threshold value, provision is made for a pump discharge capacity obtaining unit (8) configured to obtain the pump discharge capacity of the pump (5), and a correction unit (8) configured to correct the diagnostic parameter or the predetermined threshold value based on the pump discharge capacity of the pump (5), wherein the abnormality diagnosis is carried out by using the diagnostic parameter or the predetermined threshold value thus corrected.
IPC 8 full level
F01N 11/00 (2006.01); F01N 3/20 (2006.01)
CPC (source: CN EP KR RU US)
F01N 3/08 (2013.01 - RU); F01N 3/20 (2013.01 - CN); F01N 3/206 (2013.01 - US); F01N 3/2066 (2013.01 - KR); F01N 3/208 (2013.01 - EP US); F01N 11/00 (2013.01 - CN EP RU US); F01N 11/002 (2013.01 - KR US); F01N 2550/05 (2013.01 - EP US); F01N 2610/02 (2013.01 - EP US); F01N 2610/1406 (2013.01 - KR); F01N 2610/1433 (2013.01 - KR); F01N 2610/1453 (2013.01 - KR); F01N 2900/0412 (2013.01 - EP US); F01N 2900/1822 (2013.01 - EP US); Y02T 10/12 (2013.01 - EP); Y02T 10/40 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3498997 A1 20190619; EP 3498997 B1 20200715; BR 102018075398 A2 20190716; CN 109958515 A 20190702; CN 109958515 B 20210309; JP 2019105259 A 20190627; KR 102083773 B1 20200303; KR 20190071588 A 20190624; RU 2700316 C1 20190916; US 10753261 B2 20200825; US 2019186327 A1 20190620
DOCDB simple family (application)
EP 18212233 A 20181213; BR 102018075398 A 20181207; CN 201811450378 A 20181130; JP 2017239728 A 20171214; KR 20180150930 A 20181129; RU 2018144000 A 20181212; US 201816218669 A 20181213